Gary is the project manager for his organization. He is working with the project stakeholders on the project requirements and how risks may affect their project. One of the stakeholders is confused about what constitutes risks in the project. Which of the following is the most accurate definition of a project risk?

A. It is an uncertain event that can affect the project costs.
B. It is an uncertain event or condition within the project execution.
C. It is an uncertain event that can affect at least one project objective.
D. It is an unknown event that can affect the project scope.